mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-26 07:00:13 -05:00
ea7e0e9152
It's not used anymore because it does work so well. The problem is that while it transparently proxies param enums on ports to peers, it fails to emit events when those peer params change in a way that would make the enum result change as well. This makes it quite hard to use this correctly.
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/* Simple Plugin API */
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/* SPDX-FileCopyrightText: Copyright © 2019 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#ifndef SPA_NODE_UTILS_H
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#define SPA_NODE_UTILS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \addtogroup spa_node
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* \{
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*/
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#include <spa/pod/builder.h>
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#include <spa/node/node.h>
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struct spa_result_node_params_data {
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struct spa_pod_builder *builder;
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struct spa_result_node_params data;
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};
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static inline void spa_result_func_node_params(void *data,
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int seq SPA_UNUSED, int res SPA_UNUSED, uint32_t type SPA_UNUSED, const void *result)
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{
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struct spa_result_node_params_data *d =
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(struct spa_result_node_params_data *) data;
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const struct spa_result_node_params *r =
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(const struct spa_result_node_params *) result;
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uint32_t offset = d->builder->state.offset;
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if (spa_pod_builder_raw_padded(d->builder, r->param, SPA_POD_SIZE(r->param)) < 0)
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return;
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d->data.next = r->next;
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d->data.param = spa_pod_builder_deref(d->builder, offset);
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}
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static inline int spa_node_enum_params_sync(struct spa_node *node,
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uint32_t id, uint32_t *index,
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const struct spa_pod *filter,
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struct spa_pod **param,
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struct spa_pod_builder *builder)
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{
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struct spa_result_node_params_data data = { builder, {0}};
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struct spa_hook listener = {{0}, {0}, 0, 0};
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static const struct spa_node_events node_events = {
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.version = SPA_VERSION_NODE_EVENTS,
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.info = NULL,
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.port_info = NULL,
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.result = spa_result_func_node_params,
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};
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int res;
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res = spa_node_add_listener(node, &listener, &node_events, &data);
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if (res >= 0) {
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res = spa_node_enum_params(node, 0, id, *index, 1, filter);
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spa_hook_remove(&listener);
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}
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if (data.data.param == NULL) {
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if (res > 0)
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res = 0;
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} else {
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*index = data.data.next;
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*param = data.data.param;
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res = 1;
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}
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return res;
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}
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static inline int spa_node_port_enum_params_sync(struct spa_node *node,
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enum spa_direction direction, uint32_t port_id,
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uint32_t id, uint32_t *index,
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const struct spa_pod *filter,
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struct spa_pod **param,
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struct spa_pod_builder *builder)
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{
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struct spa_result_node_params_data data = { builder, {0}};
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struct spa_hook listener = {{0}, {0}, 0, 0};
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static const struct spa_node_events node_events = {
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.version = SPA_VERSION_NODE_EVENTS,
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.info = NULL,
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.port_info = NULL,
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.result = spa_result_func_node_params,
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};
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int res;
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res = spa_node_add_listener(node, &listener, &node_events, &data);
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if (res >= 0) {
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res = spa_node_port_enum_params(node, 0, direction, port_id,
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id, *index, 1, filter);
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spa_hook_remove(&listener);
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}
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if (data.data.param == NULL) {
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if (res > 0)
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res = 0;
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} else {
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*index = data.data.next;
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*param = data.data.param;
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res = 1;
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}
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return res;
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}
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#define spa_node_emit(hooks,method,version,...) \
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spa_hook_list_call_simple(hooks, struct spa_node_events, \
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method, version, ##__VA_ARGS__)
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#define spa_node_emit_info(hooks,...) spa_node_emit(hooks,info, 0, __VA_ARGS__)
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#define spa_node_emit_port_info(hooks,...) spa_node_emit(hooks,port_info, 0, __VA_ARGS__)
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#define spa_node_emit_result(hooks,...) spa_node_emit(hooks,result, 0, __VA_ARGS__)
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#define spa_node_emit_event(hooks,...) spa_node_emit(hooks,event, 0, __VA_ARGS__)
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#define spa_node_call(callbacks,method,version,...) \
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({ \
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int _res; \
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spa_callbacks_call_fast_res(callbacks, struct spa_node_callbacks, \
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_res, method, version, ##__VA_ARGS__); \
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_res; \
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})
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#define spa_node_call_ready(hook,...) spa_node_call(hook, ready, 0, __VA_ARGS__)
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#define spa_node_call_reuse_buffer(hook,...) spa_node_call(hook, reuse_buffer, 0, __VA_ARGS__)
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#define spa_node_call_xrun(hook,...) spa_node_call(hook, xrun, 0, __VA_ARGS__)
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/**
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* \}
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*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_NODE_UTILS_H */
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